Turbine-wheel.



Nofsemov. V PATENTVBJD OCT. 1, 1907.

Y J. P. M. PATITZ.

TURBINE WHEEL. APPLICATION FILED 001 .10, 1003. RENEWED MAR. 24, 1005.

UNITED STATES PATENT OFFICE.

JOHANN FRIEDRlCH MAX PATITZ, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO ALLISGHALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF NEW JERSEY.

' TURBINE-WHEEL.

' Patented. Oct'.1,1907.

Application filed October 19,1903,$eria1 No. 177,668. Renewed arch 24,1905. Serial No. 251,736.

To all whom itmay concern:

Be it known that I, J OHANN FRIEDRICH Max Pnrrrz, a citizen of theUnited States, residing at Milwaukee, in the county of Milwaukee andState of Wisconsin, 5 have invented a new and useful Turbine-Wheel, of

which the following is a specification.

Myinvention relates to steam turbine wheels. The object of the inventionis to produce a wheel which shall possess great strength combined withminimum weight, which is easilyassembled, whose vanes are so arrangedthat they can be readily inserted and rigidly attached, and whose steampassages are of the proper shape to give the best efficiency. Other;objects of the invention will appear from the following descriptiontaken in connection with the; accompanying drawing, formingpart of thespecification, in which:' i

' Figure l'is a face view of the wheel, part of the rim being brokenaway to show the vanes. Fig. 2 is a crosssection on the line :i: a: ofFig. I. Fig. 3 is aperspective view of one of the vanes. Fig. 4 is anenlarged crosssection on the line 3 y of'Fig. '3. i i i Referring to thedrawing, the wheel proper consists .of the cast hub land the steelside'plates 2 and 3, which 7.5 are united to tilde hubby rivets. Theseside plates are let into the projecting flange of the hub so that theyare flush with its outer surface, thuspres'enting a smooth unbrokensuriac'e for both faces of thewheel. The

vanes 4 are held between the two side plates. flhe plate 3 has largeopenings 5, which permit the steam,

after having passed radillly wards the center through the va'nes, tofreely pass to the next wheel chamber on the left, of Fig. 2.Smaller'openings 6, ate provided in the plate 2, in order to allow steamto to the right hand side of the wheel also, so as to.insure balance ofpressure on both sides of the wheel. The vane 4 is formed in one piecewith. itsiastening rivets Q4, and

- be either drop-forged or cast. The front and rear laces of thevanes4", 4, are given the proper outline 40v for the passage ofthe-steam.

Endflanges 4 4 are provided carrying the integral rivets 4 4. Theseflanges are beveled outwardly as to steam flow inorder to provide apassagelforthe steam which is flaring or gradually increasing incross-section towards the 'centerof the wheel. The purpose-of thisconstruction is to provide a free passage'for the steam. Thecross-section in anaxial direction of theenterip jet is determined bythe space between the thicker" portions of the flanges 4. thesteam-flows the circumference towards the center of thet'ihfi, the

transverse distance across the passage graduailyj diininislies becauseof the diminishing. radius. fIn'order,

, therefore, to permit the jet to pass out between this vanes freely andwithout interference with the next following jet, or the formation ofwhirls, the passage is increased axial and made flaring, as shown, thusallowing the'jet toexpand axially.

Having thus described my invention, what I claim s 1. A turbine-vaneprovided with flanges at the vane ends extending .beyond the concaveside of the vane, said flanges being beveled outwardly as to steam flow,and being provided with fastening means for the vanes, substantially asdescribed. I

2. A turbine vanepflanges at the vane ends extending beyond the concaveside of the vane, and pins on the flanges for fastening the'vane.

3. A turbine vane provided with flanges at the vane ends extendingbeyond the concave side of the.vane, said flanges being beveledoutwardly as to steam flow and fastening means on the flanges forholding the vane.

4. A turbine wheel. consisting of a hub and two side plates and vanesinserted between the plates and fastened thereto,- said vanes consistingof a central curved part,-.end flanges extending to the outer lines ofthe curved part, beveled portions'on the flanges affording increasingcross section of steam passage, and fastening means on the flanges andco-actIngwith the side plates of the wheel.

5. t turbine wheel comprising a hub, side .plates attached to said hub,and flanged vanes rigidly held between the side plates the flanges beingformed to provide nozzle passages between the vanesr 6. A wheelincluding annular'sidc plates, a hub upon which the plates are mounted,and vanes peripherally mounted between the side plates, the plates beingported -for exhaust and for balancing.

7. The combination with a turbine shaft, of a turbine running wheelhaving an interior cavity and apertures in both side walls communicatingwith the exterior at the sides of said wheel. and between thev shaft andthe periphery ofthe wheel siid wheel being provided with peripheralvanes arranged-for the inward delivery of motive fluid to said cavity,and the interior wall-faces' ofsaidcavity being substantially parallel.

8. The combination with a turbine shaft. of a-turbine running wheelhaving an interior cavity and apertures in both side walls communicatingwith'tl e. exterior at the sides ofsaid wheel and between the shaft andthe periphery of the wheel; said'wheei being provided with periph eralvanes arranged for the inward delivery -of motive fluid to said cavitmand the lnterior'wull faces of said cavity being substantially paralleladjacent to the vanes.

' 9. The combination with a turbine shaft. of a turbine running wheelcomprising parallel side disks: vanes interposed between the peripheralportions of said disks; and nozzles arranged for the inward delivery ofmotive fluid to the-vanes and .theinterlor'sp'ace between said disks;said disks" heingboth provided with apertures, of greater capacity thanthe capacity of the nozzles.

' In testimony whereot'I have signed mynmne to this specification in thepresence of two subscribing witnesses.

JOHANN-FRIEDRICH MAX PATITZ.

